Inflammation is part of a complex biological response of the immune system to harmful stimuli, such as pathogens, damaged cells, or irritants. The function of inflammation is to eliminate the initial cause of cell injury, clear out necrotic cells and tissue damaged from the original insult and to initiate tissue repair.
While acute inflammation is initially good, silent chronic inflammation can cause most harm. It gradually weakens the immune system making it increasingly prone to dysfunction and contributing to the development of chronic illnesses. Chronic aches and pains is an example of the harm caused by chronic inflammation.